Closed Loop Resource Allocation
First Claim
1. A method for determining reverse link transmission rate at a mobile station comprising:
- transmitting data at a first transmission rate;
receiving a busy signal from each of a first set of a plurality of base stations; and
if any of the received busy signals indicates capacity loading on the reverse link, stochastically reducing the first transmission rate to a second transmission rate.
1 Assignment
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Accused Products
Abstract
Method and apparatus for performing transmission data rate allocation in a high speed wireless communications network. A macro control loop with the network of base stations on one side and all the subscriber stations on the other side. Subscriber station selects a rate based on the amount of data queued for transmission (100). Adjusts this rate based on the available power headroom of the subscriber station (102). This adjusted transmission rate is then adjusted again to account for protection of base stations in the candidate set of the subscriber station (104). This rate is then adjusted in accordance with busy tone signals indicative of the loading conditions of active set base stations of the subscriber station (108). The base stations react to these action by refreshing measurements of their instantaneous traffic load and providing feedback in the form of soft busy tones. The algorithm is named Closed Loop Resource Allocation.
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Citations
13 Claims
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1. A method for determining reverse link transmission rate at a mobile station comprising:
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transmitting data at a first transmission rate;
receiving a busy signal from each of a first set of a plurality of base stations; and
if any of the received busy signals indicates capacity loading on the reverse link, stochastically reducing the first transmission rate to a second transmission rate. - View Dependent Claims (2, 3)
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4. A mobile station comprising:
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means for transmitting data at a first transmission rate on a reverse link;
means for receiving a busy signal from each of a first set of a plurality of base stations; and
means for stochastically reducing the first transmission rate to a second transmission rate if any of the received busy signals indicates capacity loading. - View Dependent Claims (5, 6)
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7. A base station comprising:
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means of measuring reverse link loading; and
means for transmitting a busy tone signal indicative of said reverse link loading. - View Dependent Claims (8, 9, 10, 11)
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12. A method for determining reverse link transmission rate at an access terminal, comprising:
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initializing a current rate limit to a first rate limit value;
receiving a message indicating a second rate limit value;
comparing the second rate limit value to the first rate limit value;
if the second rate limit value is less than or equal to the first rate limit value;
storing the second rate limit value as the current rate limit; and
if the second rate limit value is greater than the first rate limit value;
maintaining the first rate limit value as the current rate limit for one frame after receiving the message; and
storing the second rate limit value as the current rate limit. - View Dependent Claims (13)
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Specification